Evaluation of low-temperature performance of asphalt paving mixtures

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• 作者：Yiqiu Tan ; Lei Zhang ; ^{hit.andy@foxmail.com} ; Huining Xu
• 关键词：Asphalt mixture ; Low temperature performance ; TSRST ; Bending strain energy ; Gray relational analysis
• 刊名：Cold Regions Science and Technology
• 出版年：2012
• 出版时间：January 2012
• 年：2012
• 卷：70
• 期：Complete
• 页码：107-112
• 全文大小：569 K

文摘

Low temperature cracking is the major damage in asphalt pavement, and many test methods have been used to evaluate the anti-cracking property of asphalt mixture. This paper evaluates the low temperature performance of asphalt mixture using four tests namely: beam bending test, indirect tensile test, contraction coefficient test and thermal stress restrained specimen test. Five types of asphalt mixtures namely: A, B, C, D and E were evaluated. Results show that compared with the thermal stress restrained specimen test, beam bending test, indirect tensile test and contraction coefficient test are not appropriate for the evaluation of asphalt mixtures low temperature performance. Moreover, results of gray relational analysis demonstrate that the bending strain energy density is significantly correlated to fracture temperature. It is reasonable to adopt the critical values of bending strain energy density to evaluate the low temperature performance of asphalt mixture in the absence of fracture temperature.